For dvr scenario, if port has a bound floating, and then create
port forwarding to it, this port forwarding will not work, due to
the traffic is redirected to dvr rules.
This patch restricts such API request, if user try to create port
forwarding to a port, check if it has bound floating IP first.
This will be run for all type of routers, since neutron should
not let user to waste public IP address on a port which already
has a floating IP, it can take care all the procotol port
numbers.
Conflicts:
neutron/services/portforwarding/pf_plugin.py
Closes-Bug: #1799137
Change-Id: I4ba4b023d79185f8d478d60ce16417d3501bf785
(cherry picked from commit b8d2ab8543)
9749fd270c